Explain what occurs in cell differentiation and morphogenesis

cells become specialized in structure and function, and these are organized into tissues and organs. Activities of a cell depend on the genes it expresses and the proteins it produces. Specific activators turn on the collection of genes whose products are needed in the cell. Materials placed into the cell by the mother set up a sequential program of gene regulation that's carried out as cells divide.Explain what occurs in morphogenesis:The physical processes that give an organism its shape. Literally meaning, "creation

That would be a working theory.